def __init__(self, socket, address):
super(Datapath, self).__init__()
self.socket = socket
# TCP_NODELAY 不使用Nagle算法
self.socket.setsockopt(IPPROTO_TCP, TCP_NODELAY, 1)
# 设置阻塞时间
self.socket.settimeout(CONF.socket_timeout)
self.address = address
self.is_active = True
# The limit is arbitrary. We need to limit queue size to
# prevent it from eating memory up.
# 限制是任意的。
# 我们需要限制队列大小以防止它占用内存。
self.send_q = hub.Queue(16)
# 有限信号量
self._send_q_sem = hub.BoundedSemaphore(self.send_q.maxsize)
self.echo_request_interval = CONF.echo_request_interval
self.max_unreplied_echo_requests = CONF.maximum_unreplied_echo_requests
self.unreplied_echo_requests = []
self.xid = random.randint(0, self.ofproto.MAX_XID)
self.id = None # datapath_id is unknown yet
self._ports = None
self.flow_format = ofproto_v1_0.NXFF_OPENFLOW10
self.ofp_brick = ryu.base.app_manager.lookup_service_brick('ofp_event')
# 状态标识
self.state = None # for pylint
self.set_state(HANDSHAKE_DISPATCHER)
def __init__(self, *_args, **_kwargs):
super(RyuApp, self).__init__()
self.name = self.__class__.__name__
self.event_handlers = {} # ev_cls -> handlers:list
self.observers = {} # ev_cls -> observer-name -> states:set
self.threads = []
self.main_thread = None
self.events = hub.Queue(128)
self._events_sem = hub.BoundedSemaphore(self.events.maxsize)
if hasattr(self.__class__, 'LOGGER_NAME'):
self.logger = logging.getLogger(self.__class__.LOGGER_NAME)
else:
self.logger = logging.getLogger(self.name)
self.CONF = cfg.CONF
#modify by hmily
if self.CONF.enable_debugger:
self.logger.setLevel(logging.DEBUG)
self.logger.debug("[debug]--ryuApp init")
# prevent accidental creation of instances of this class outside RyuApp
class _EventThreadStop(event.EventBase):
pass
self._event_stop = _EventThreadStop()
self.is_active = True
def __init__(self, *_args, **_kwargs):
super(RyuApp, self).__init__()
# 其name 即为类的名字
self.name = self.__class__.__name__
# 事件 与 句柄列表 的字典
self.event_handlers = {} # ev_cls -> handlers:list
self.observers = {} # ev_cls -> observer-name -> states:set
# 线程列表
self.threads = []
self.main_thread = None
# hub.Queue 并发队列，其最大数量为128
# 存放 事件及状态
self.events = hub.Queue(128)
# 声明有限信号量，其最大个数与hub.Queue.maxsize相同，即128
self._events_sem = hub.BoundedSemaphore(self.events.maxsize)
# 判断是否含有LOGGER_NAME 属性，self.__class__即指向该类
if hasattr(self.__class__, 'LOGGER_NAME'):
self.logger = logging.getLogger(self.__class__.LOGGER_NAME)
else:
self.logger = logging.getLogger(self.name)
self.CONF = cfg.CONF
# prevent accidental creation of instances of this class outside RyuApp
# 防止在RyuApp之外意外创建此类的实例
class _EventThreadStop(event.EventBase):
pass
self._event_stop = _EventThreadStop()
# 标识
self.is_active = True
def __init__(self, *_args, **_kwargs):
super(RyuApp, self).__init__()
self.name = self.__class__.__name__
# {注册事件:该事件处理函数（可能有多个）}
self.event_handlers = {} # ev_cls -> handlers:list
self.observers = {} # ev_cls -> observer-name -> states:set
self.threads = []
self.main_thread = None
self.events = hub.Queue(128)
self._events_sem = hub.BoundedSemaphore(self.events.maxsize)
if hasattr(self.__class__, 'LOGGER_NAME'):
self.logger = logging.getLogger(self.__class__.LOGGER_NAME)
else:
self.logger = logging.getLogger(self.name)
self.CONF = cfg.CONF
# prevent accidental creation of instances of this class outside RyuApp
class _EventThreadStop(event.EventBase):
pass
self._event_stop = _EventThreadStop()
self.is_active = True
